Blindstitch sewing-machine.



PATENTED DEC. 31, 1907.

. W. N. PARK'ES. BLIN'DSTITGH SEWING MACHINE. APPLIUAIION FILED SBPT.10. 1900. RENEWED Nov. 18,1907.

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PIATENTED 1130.31, 1907.

w. N. PARKES. BLINDSTITGH SEWING MACHINE. APPLICATION FILED SEPT. 10, 1900. RENEWED NOV.1'8,1907.

3 SHEETS-SHEET 2- zwmiw PATENTED DEC. 31, 1907.

W. N. PARKES. BLINDSTITGH SEWING MACHINE.

APPLICATION FILED SEPT. 10. 1900. RENEWED NOV. 18.1907.

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THE NORRIS wz-rsns co.. WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

WILLIAM N. PARKES, OF BROOKLYN, NEW YORK.

BLINDSTITGH SEWING-MACHINE.

Specification of Letters Patent.

Patented Dec. 3 1 1 907.

Application filed $eptember 10. 1900. Serial No. 29,580. Renewed November 18, 1907- Serial No. 402,737-

To all whom it may concern.

Be it known that 1, WILLIAM N. PARxns, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Blindstitch Sewing- Machines, of which the following is a specification.

My invention has reference to blind stitch sewing machines, but is not confined exclusively to this class.

It has for its main object a simple mechanism which can be applied to any sewing machine in which the needle is reciprocated or moved laterally.

It has for its object, also, a simple and positive feed mechanism located above the cloth plate which can be used on any kind of a sewing machine where such a TGGClgIS desirable.

Other objects of the invention will be seen and explained in connection with the drawings.

In the drawings Figure 1 is a front elevation of a machine embodying my invention, Fig. 2 is a rear elevation of the same, Fig. 3 is a longitudinal section on line aa Fig. 1 Fig. 4 is a vertical section on line b?) Fig. 3 Fig. 5 is a vertical section on line cc Fig. 3, Fig. 6 is an enlarged top plan view of the feed wheel and roller presser, the part broken away showing the engagement of the pawls 41 and 42 with the wheel, Fig. 7 is a diagrammatic view showing the needle in engagement with the work and, in dotted outlines, its position in descending when not in engagement with the work, Fig. 8 is a view of the feed wheel cap showing the friction strap operating spring attached thereto, and Fig. 9 is a detail of the friction device.

In the machine, A represents the overhanging arm and B the bed plate. In a suitably pivoted gate C is mounted the needle bar D. A link E connects the needle bar gate O with a grooved segment F. The segment F is secured to the end of the shaft G which is mounted to turn in a'transverse bearing on the top of the arm A. H is a presser bar mounted in a usual manner. The segment F is vibrated in a usual manner by means of a switch cam which is mounted on the upper shaft of the machine (not shown). The mechanism thus. far described is usual to over-seaming or zig-Zag machines and forms no part of my invention. The understitching mechanism can be of any usual construction which is used. in machines erally moving needle.

On a stud I which is secured in the bed plate B is pivoted a lever 2. A stud 3 having large portions 4. and 5 passes freely through a seat in the handle 6, which is nut shaped at the base and which serves to lock the stud in the lever 2. On the portion 4 of the stud 3 is pivoted to turn a feed wheel 7 in the periphery of which are formed teeth 8 having between them slots or grooves 9, which are, at their base, sufliciently large to permit of the passage of the needle. A receptacle 10 is formed on the under side and within the wheel '7, sufficiently large to permit the aphaving a latplication of a friction device which I will now end of the stud 3 is a reduced portion 15. A-

cap 16 sufficiently large to cover the receptacle 10 is near its outer edge attached by means of suitable screws to the feed wheel 7. A boss 17 is formed on the under side of the cap 16, through which passes a hole 18 in which the reduced portion 15 of the part 5 fits free enough to permit the cap to turn freely with the feed wheel 7 to which it is secured. A stud 19 is adapted to retain one end of spiral spring 20 having extending end 21 which impinges against a pin 22. The boss 17 extends sufficiently from the cap 16 to permit of the free action of the spring 20 when said cap is in its position on reduced portion 15 of stud 3, as shown in Fig. 4.. A pin 23 extends downward from the extending end 12 of the strap 11 and engages the extending end 21 of the spiral spring 20. It will now be seen that if the wheel 7 turns in the direction indicated by arrow Fig. 6, that the extending end 21 of the spring 20 will engage the pin 23. When this engagement hole in the lever 2 into a threadedcommences the extending end 21 yields until seen that there is a yielding force produced drawing on the wheel in the opposite direction to its forward movement. In other words the friction is regulated by the screw 14, so that the friction developed between the strap and the channel in the portion 5 is sufliciently strong, to carry the end 21 of the spring away from the stop pin 22, after which the strap commences to slip relative to its bearing. 1t is thus seen that when this condition is brought about, and the opera tion of the machine is continued, that the spring is drawing on the feed wheel in the opposite direction to its forward movement. And it is thus seen that if the feed wheel throws ahead, or if there is any spacebetween the nose of the stop pawl 42 and the teeth of the wheel, the spring will draw the wheel back, until the tooth abuts the stop pawl, when the return stroke of the actuating pawl commences. It is thus seen that means are provided for drawing on the feed wheel in the opposite direction to its forward movement, and that said means pulls the wheel back against the stop pawl if it is thrown ahead any, or if the actuating pawl carries it slightly ahead, so that the stop pawl may freely drop into engagement with a tooth of the wheel. This insures the wheel always being in the same position relative to the needle when the latter descends, and it also insures the wheel always starting forward from a predetermined point.

I will now explain the mechanism which operates the wheel 7. On the rear end of the shaft G is secured a segment lever 24 in which is formed a curved way 25. A link 26 is at one end secured in a usual manner in the way 25 of the segment 24 and at its other end to a lever 27. A lever 28 is pivoted at 29 to bearing 30. The lever 27 is pivoted at 31 on the lever 28 and connectedat its lower end to a link 32. A cup 33 secured by the Stud 1, as shown in Fig. 4, serves as a pivot for a lever 34 having a bearing 35 formed thereon and surrounding said cap. A spiral spring 36 surrounding the bearing 35 has an extension 37 normally drawing on the lever 2 in the direction shown by the arrow Fig. 3. Abolt 38 passing through the lever 2 and coming into contact with the bearing 39 projecting vertically from the bedplate serves as an adjustable means for limiting the movement of the lever 2 in the direction indicated by said arrow in Fig.3. The forward end of the link 32 is connected to the lever 34 by means of a screw40 which screw carries a pawl 41 adapted to engage the wheel 7. A stop pawl 42 is suitably attached to the outer end of the lever 2 and adapted to engage the teeth of the wheel 7 and thereby prevent retrograde movement of the same. A link 42* is connected at one end to the lower end of the lever 28 and at its other end to the lever 2. To the lower end of the presser bar H is attached one end of a bearing 43. To the other end of the bearing 43 is secured a screw 44 having a large portion 45 on which is mounted to turn a disk 46. The periphery of the disk 46 has a convex surface 47 which conforms with a concave surface 48 of the wheel 7 as shown in Fig. 5. moved in a vertical plane by means of presser bar H against the usual presser bar spring (not shown) but has no movement in a horizontal plane.

In the operation of the machine where, for

example, it is desired to blind stitch a hem, the work is inserted between the disk 46 and the wheel 7. The needle descends in slots 9 alternately, through the work and beyond the edge thereof as indicated in Fig. 7. The outside of the work being stitched is normally pressed by the wheel 7 through the action of the spring 37 against the periphery of the disk 46, which disk it is remembered has no horizontal movement. The working position of the needle is so adjusted relative to the disk 46 and the work being stitched that the needle just pierces the outer portion of the work without going through the other side of the same, as indicated in Fig. 7. The work can be removed from the machine by raising the presser bar which action raises the disk 46 and presses wheel 7 laterally until disk 46 has been raised above said wheel, when the wheel resumes its normal position.

The wheel 7 being readily moved to the right by the handle 6, it may be seen that the work is easily inserted and removed from the machine.

The pivoting of the lever 27 on the lever 28 and the connection between the lower end of the lever 28 and the lever 2 is done to prevent angular movement of the wheel 7 when the same is moved away from the disk 46 so as to prevent any change in the position of slots 9 relative to the needle by reason of any uneven surfaces or seams passing between the disk 46 and the wheel 7. To illustrate, in blind stitching the hem at the bottom of trousers the longitudinal seam of a leg of a trousers increases the thickness of the work and thereby causes wheel 7 to move away from disk 46. This movement of the wheel 7 moves the lever 2, the stop pawl 42, the link 42*, the lever 28, the lever 27, the link 32 and. the pawl 41 to the right. It is noted, of course, that the lever 2 carrying the wheel 7 and the stop pawl 42 and the lever 34 carrying the actuating pawl 41 move around the center of the pivotal screw 1. Thus it is seen that the angular position The disk 46 is venting the angular movement of the wheel 7 could be dispensed with. Constructed in this manner, of course, the lever 27 would.

be mounted to turn on a fixed pivot. WVhere other than'very short stitches are made the slots 9 can be of suflicient width to permit of the free movement of the needle through them notwithstanding the slight angular movement of the wheel caused by the uneven surfa'ces of the work being stitched.

The length of the stitch may be changed by inserting other wheels in place of the wheel 7, with more or less teeth in the pe riphery of the same, and the extent of the stroke of the actuating pawl 41 may be regulated to meet such change in the teeth of the wheel. For example, if it is desired to have a longer stitch the wheel is constructed with a less number of teeth in its periphery, and this of course brings the grooves that the needle enters further apart, and makes it necessary to move the wheel 7 a greater extent at eachstroke of the actuating pawl 41. To secure this increased movement of the said pawl the end of the link 26 is adjusted away from the pivot G of the lever 24.

When it is desired to have a shorter stitch or less movement of the work to each stitch the teeth in the feed wheel used are of course made closer together, and the extent of the stroke of the actuating pawl is accordingly reduced. When the end of the link 26 is located over the pivot G of the lever 24, no movement is imparted to the mechanism operated by it.

It is to be noted that my invention as herein disclosed is adapted for use in connection with an ordinary zigzag machine, that the bearing or bracket 43 is attached to the lower end of the usual presser bar H, and that the feed wheel 7 is operated from the movement of the means by which the needle bar is moved laterally in the usual zigzag machines. It is therefore to be understood that the invention may be readily attached to any zigzag machine, but it is obvious that it is not confined to this class of machines. For example, it is not necessary to vibrate the needle laterally to do blind stitching with my invention. By referring to Fig 7 it will be seen that blind stitching would be done if the needle was reciprocated vertically only. It isof course clear that if the work be lapped a little further than that shown in Fig. 7, that the needle in descending will pierce the lapped portion of the material a second time, and just at the edge of the same, and that thus a blind stitch may be made without moving the needle laterally. W hen it is desired to do blind stitching without moving the needle laterally, the end of the link E is adjusted over the pivot G of the segment lever F which adjustment arrests the lateral movement of the needle.

I do not wish to be confined to the particular construction herein shown as it is evident that modifications could be made in the same for special purposes without departing from the spirit of my invention.

l/Vhat I claim as new is 1. A sewing machine having stitch-forming mechanism comprising a reciprocating and vibrating needle; and a feeding mechanism comprising a feed-wheel having means for the reception of the needle and to shield the work therefrom.

2. In combination, a stitch-forming mech anism comprising a vertically reciprocating and laterally vibrating needle; and a feeding mechanism comprising a feed-wheel having means for the reception of the needle and to shield the work therefrom.

3. In combination, a stitch-forming mechanism comprising a reciprocating and vibrating needle; and a feeding mechanism comprising a disk pivoted to rotate in a horizontal plane, and a feed-Wheel having means for the reception of the needle and to shield the work therefrom.

4. A sewing machine having stitch-forming mechanism comprising a reciprocating and vibrating needle; and feeding mechanism comprising a disk pivoted to rotate in a horizontal plane, and a wheel having means, for the reception of the needle and to shield the work also pivoted to rotate in a horizontal plane.

5. A sewing machine having stitch-forming mechanism comprising a vertically reciprocating and laterally vibrating needle; and a feeding mechanism comprising a rotary disk and a cooperating wheel yieldingly pressed against the disk having grooves in its periphery for the reception of the needle.

6. A sewing machine having stitch-forming mechanism comprising a vertically recip rocating and laterally vibrating needle; and a feeding mechanism comprising a rotary disk; means for holding said disk from lateral dis placement; means for moving said disk vertically and a cooperating wheel normally held against the disk.

7. A sewing machine comprising a feeding mechanism having a vertically movable and horizontally disposed disk, and a feed-wheel cooperating with and movable laterally relatively to the disk, said wheel being provided with grooves extending transversely of its periphery for the reception of the needle, means for operating-said feed wheel.

8. A sewing machine comprising a feeding mechanism having a vertically movable rotary disk and a cooperating pivotally supported feed-wheel movable bodily laterally relatively to the disk, a reciprocating needle adapted to pass between said feed wheel and said disk and thereby engage the work, and means for preventing angular movement of said wheel when moved laterally relatively to the disk, whereby when the feed-wheel is moved laterally it will not be rotated and said disk may be elevated.

9. A sewing machine comprising a vertically reciprocating and laterally vibrating- 5 needle; and a feeding mechanism comprising a laterally movable feed-wheel having means for the reception of the needle and to shield the work; and means for maintaining the angular position of the wheel relatively to the needle when said wheel is moved laterally.

10. A sewing machine comprising a vertically reciprocating and laterally vibrating needle; a feed mechanism comprising a feedwheel having means for the reception of the needle; means for positively actuating said wheel; and means for yieldingly holding said wheel in contact with the work during the operation of the machine.

11. A sewing machine comprising a vertically reciprocating and laterally vibrating needle; a feeding mechanism comprising a feed-wheel having means for the reception of the needle; and means for actuating the said wheel once for every' two reciprocations of the needle.

12. A sewing machine comprising a vertically reciprocating and laterally vibrating needle; a feed mechanism comprising a wheel having means for the reception of the needle; and means for actuating said needle and wheel so as to impart a degree of movement to the Wheel for every vibration and for every two reciprocations of the needle.

13. A sewing machine comprising a vertically reciprocating and laterally vibrating needle; afeed mechanism; meansf or vibrating said needle and actuating said feed mechanism, involving a main shaft and a two-armed rocking device driven therefrom; and separate trains of mechanism connecting the arms of said device with said needle and said feed mechanism respectively.

14. A sewing machine comprising a vertically reciprocating and laterally vibrating needle; a rotary feeding mechanism; means for vibrating said needle and for giving to said feeding mechanism intermittent rotation, involving a main shaft and a two-armed rocking device driven therefrom; and separate trains of mechanism connecting the arms of said device with said needle and said feed mechanism respectively.

15. In combination, stitch-forming mechanism and feeding mechanism, the parts thereof being arranged so as to hold the work always in the same position relative to the needle at the stitching point and to prevent the needle penetrating to the face of the work, and means for preventing the needle from engaging the work at alternatereciprocations.

16. A sewing machine comprising a vertically reciprocating and laterally vibrating needle; a feeding mechanism comprising a wheel having means for the reception of the needle and to shield the work; and means for varying the degree of feed movement of said wheel.

17. In combination in a sewing machine, a stitch forming mechanism com rising a vertically reciprocating and laterall ing needle, a feeding mechanism comprising a feed wheel adapted to engage the work, means for operating the said feed wheel, a roller presser or disk adapted tohold the work in engagement with the said feed wheel, and ways formed in the said feed wheel to permit of the passage of the needle.

18. In combination in a sewing machine,

a stitch forming mechanism com rising a vertically reciprocating and lateral y vibrating needle, a feed mechanism comprising a. feed wheel adapted to engage the work,ways formed in the feed wheel to permit of the passage of the needle, a pawl for operating the feed wheel, and means for operating the awl. p 19. In combination in a sewing machine, stitch forming mechanism comprising a vertically reciprocating and laterally vibrating needle, a feed mechanism comprising a wheel adapted to engage the work, teeth in the periphery of the wheel, a pawl adapted to engage the said teeth, means for operating the pawl, and ways formed in the wheel to permit of the passage of the needle.

20. In combination in a sewing machine, stitch forming mechanism comprising a vertically reciprocating and laterally vibrating needle, a feed mechanism comprising a feed wheel mounted to rotate in ahorizontal plane, said feed wheel adapted to engage the work, means for intermittently rotating the feed wheel, and ways formed in the periphery of same whereby the needle is permitted to alternately descend free from engagement with the work.

21. In combination in a sewing machine, stitch forming mechanism comprising a vertically reciprocating and laterally vibrating needle, a feed mechanism comprising a wheel pivoted to turn in a horizontal plane, a disk pivoted in a horizontal plane, the peripheries of the said wheel and the said disk constructed so as to feed the work and permit of the vertical and lateral movement of the needle, and means for operating the said wheel and the said disk.

22. In combination in a sewing machine,

a stitch-forming mechanism, a feed mechanism comprising a wheel supported to rotate and to move bodily circularly, a pawl and ratchet mechanism for rotating the said wheel, and means adapted to maintain the wheel in a predetermined angular position irrespective of different degrees of bodily circular movements of the same.

28. In combination in a sewing machine,

a stitch-forming mechanism, a feed mechanism comprising a disk adapted to rotate in a horizontal plane, a spring for depressing the yvibrat- 70 said disk in a vertical plane, a feed wheel adapted to rotate and move in a horizontal plane, a spring adapted to move the feed wheel towards said disk, said feed wheel and disk'so constructed as to permit of the move ment of the needle between them, and means for rotating the feed wheel.

24. In combination in a sewing machine, a stitch-forming mechanism, a feed mechanism comprising a feed wheel mounted on a lever, a vibrating lever, means intermediate the said vibrating lever and the said wheel whereby the wheel is rotated from the movement of the lever, and means intermediate the aforesaid lever and the vibrating lever whereby the fulcrum of the vibrating lever is moved laterally when the lever is moved laterally.

25. In combination in a sewing machine, stitch forming mechanism, a feed mechanism comprising a feed wheel adapted to move laterally, teeth formed in the periphery of the said feed wheel, a pawl adapted to engage the said teeth, a vibrating device, means intermediate the said device and the pawl whereby the pawl is operated from the movement of the device,- and means intermediate the feed wheel and the device whereby the device is moved laterally when the feed wheel is moved laterally.

26. In combination in a sewing machine, stitch forming mechanism comprising a vertically reciprocating and laterally vibrating, needle, a feed mechanism comprising a disk adapted to rotate, a feed wheel adapted to rotate, the periphery of the disk being formed convex, a portion of the periphery of the feed wheel being formed concave and through which ways are formed for the passage of the needle, said concave portion terminating at its upper side in a raised and extending portion in which teeth are formed, a pawl for engaging the said teeth, and means for operating the said pawl.

27. In combination in a sewing machine, a stitch forming mechanism, a feed mechanism comprising a pivoted lever, a toothed feed wheel mounted on the said pivoted lever, a second lever, the fulcrum of which is coincident with the fulcrum of the first lever, a pawl adapted to engage the toothed feed wheel mounted on the second lever, means for vibrating the second lever, and yielding means for holding the feed wheel in engagement with the work.

28. In combination in a sewing machine, a stitch forming mechanism, a feeding mechanism comprising a feed wheel adapted to engage the work, a stud mounted in a bearing, the feed wheel mounted on the said stud, a receptacle formed in the side of the feed wheel, an enlarged portion formed on the aforesaid stud, said enlarged portion located in the said receptacle, a friction strap mounted on the periphery of the enlarged portion of the stud, a disk or cap attached to the feed wheel which is adapted to close the receptacle in the side of the same, a spiral spring one end of which is attached to the disk or cap and the free end of which is adapted to engage the aforesaid friction strap, and means for operating the aforesaid feed wheel.

29. In combination in a sewing machine, a stitch forming mechanism comprising a disk mounted to rotate in a horizontal plane, a lever pivoted to move in a horizontal plane, a feed wheel adapted to engage the work and mounted on the said lever, a second lever pivoted to move in a vertical plane, a connection between the said first and the said second lever, a third lever pivoted on the second lever, means for vibrating the said third lever, a fourth lever pivoted to move in a horizontal plane, a pawl adapted to engage the feed wheel mounted on the said fourth lever, and a connection between the said fourth lever and the third lever.

30. In combination in a sewing machine, a stitch forming mechanism, a feed mechanism comprising a stud, a lever mounted on the said stud, a feed wheel adapted to engage the work mounted on the lever, a bearing in the form of a cup extending around the fulcrum of the said lever, a second lever pivoted on the said bearing, a pawl adapted to engage the feed wheel mounted on the said second lever, and means for vibrating the said second lever.

31. A sewing machine having stitch-forming mechanism, and a feeding mechanism, the latter comprising a wheel for traversing .the work in the line of the seam and also having its periphery concaved for receiving the work at the stitching point and also having means for the reception of the needle of the stitch-forming mechanism.

32. A sewing machine having stitch-forming mechanism including a vibrating needle, and a feeding mechanism, the latter comprising a wheel having means for the reception of the needle, and means for shielding the work from the needle during certain of its movements.

33. A sewing machine comprising stitchforming mechanism having a vibrating nee-' dle, and a feeding mechanism including a rotary wheel and a cooperating device to advance the work, said wheel and device having means for bending the work at the stitching point so'that the needle will pass in and out thereof on the same side, and the wheel having means for guarding the work from the needle during certain of its movements.

34. A sewing machine comprising stitchforming mechanism, and feeding mechanism, the latter including a vertically movable disk and yielding means for normally de ressing the same, a horizontally movable wlibel and yielding means for normally pressing the same toward the disk, and the disk and wheel,

at their cooperating portions, having means for bending the work so the needle will pass in and out thereof on the same side, and also having means for preventing the engagement of the needle with the work during certain of its movements.

35. A blind stitch machine including among its elements, a stitch forming mechanism having a vertically reciprocating and laterally vibrating needle, and a feeding mechanism, the latter including a circularly moving device for traversing the work past the stitching point in the line of the seam, and also having means for holding the work so that the needle of the stitch-forming mechanism will alternately engage and. miss the work.

36. A blind stitch machine including among its elements, a stitch-forrhingmechanism having a vertically reciprocating and laterally vibrating needle, and a feeding mechanism, the latter including two cooperating circularly moving devices for traversing the work past the stitching point in the line of the seam, and said feeding mechanism also having means for holding the work so that the needle of the stitch-forming mechanism will alternately engage and miss the work.

l 37. A blind stitch machine including among its elements, a stitch forming mechanism having a vertically reciprocating and I laterally vibrating needle, and a feeding mechanism, the latter including a circularly moving device for traversing the work past the stitching point in the line of the seam, and said mechanism having a device cooperating with the circularly moving device to hold the work so that the needle of the stitch-forming mechanism will alternately engage and miss the work.

38. A sewing machine comprising a feed wheel adapted to contact with the work, means for operating said feed wheel, a friction device carried by said feed Wheel, a spring, one end of said spring in engagement with said friction device, and the other end of said spring in engagement with a stationary part of the machine.

Signed at New York in the county of New York and State of New York this sixth day of September A. D. 1900.

' WILLIAM N. PARKES.

Witnesses:

R. C. BoswELL, J. B. MOGIRR. 

